Improved Ion-Exchange Separation of Rare-Earth Elements for Spectrographic Analysis

摘要

Rare-earth elements are separated from scandium and base metals by adsorption onto anion resin BIORAD AG1-X8 in the nitrate form from a mixture of 5% 7 M nitric acid and 95% methanol. The yttrium subgroup is eluted with a mixture of 45% 7 M nitric acid and 55% methanol, followed by elution of the cerium subgroup with 8 M nitric acid. This separation facilitates the determination of the traces of the heavier yttrium subgroup of rare-earth elements. (ERA citation 10:002836)